1)initial action,先期行动2)propulsion having top priority,动力先行3)prerequisite activity,先行活动4)leading terms te st,先行期数检验5)advanced menstruation due to blood-heat,血热经行先期6)beat sb to the draw,抢先某人行动
用法例句
Mary wanted to buy that painting by Picasso, but another millionaire beat her to the draw